The UK's three meningitis charities have joined forces to launch an awareness campaign. They want parents to stay vigilant for signs of the disease, even if their children have had injections.
An information film to be shown at the Little Theatre cinema next week in Bath will warn that children aren't protected against all types of meningitis.
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Parents have said they are pulling their children out of school for the day in strike action against the government.
A phone line mix-up has caused chaos in a village - after residents were left with their neighbours's numbers.
Among the cyclists is Andrew Venn whose son Joe has a congenital heart condition and will need hospital treatment all his life.